How to keep my iphone updated without a computer or itunes?

I have my iPhone and ipod synced on itunes on my mac at home but i will be moving away from home and won't be able to connect my phone to itunes where everything is stored anymore. How can i keep it updated without itunes?
If there's no solution, I DO have a macbook pro, but i have none of my iphones info on it at all.

10 for best answer

Your iPhone will automatically get the new version of iOS.
A notification will appear on the setting app, and if you open it you would have to go to general and then software update and then update your iPhone. Your iPhone will turn off and reboot and the new version of iOS will be installed without a computer

Any app or system software updates can be done right on the phone (as long as you have enough free space for the installation).